Volume 15, Number 9—September 2009
Phylogeny and Disease Association of Shiga Toxin–producing Escherichia coli O91
|Severe disease||ST442, no. (%)||Non-ST442, no. (%)||Odds ratio||95% Confidence interval||p value|
|HUS||4 (20)||0 (0)||27.8†||3.29–∞||<0.01|
|BD||3 (15)||5 (6)||3.4||0.47–20.1||0.25|
|HUS or BD||7 (35)||5 (6)||7.8||1.83–36.6||<0.01|
*Reference group consisted of persons who had nonbloody diarrhea or who were asymptomatic carriers. STEC, Shiga toxin-producing Escherichia coli; ST, sequence type; HUS, hemolytic uremic syndrome; BD, bloody diarrhea.
†Mean unbiased estimate.
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